立井混合作业新型筑壁钢模

New Type of Steel Form for Building Shaft wall

一、短段筑壁钢模的现状立井混合作业工艺是五十年代发展起来的。至1966年,苏联混合作业占98％。日本用混合作业施工的登川2号井,最高月进120.2m,平均71.1m;三井沙川中央立井最高月进157.1m,砌壁工效8.3m^3/工。我国从1965年河南米村主、副井研制第一套金属活动模板以来,红工、长广、九龙口、杏花、三河尖等矿先后使用,混合作业已在我国煤矿施工了不少立井。目前筑壁金属活动模板还存在易变形、脱模难、找正慢、接茬差等技术问题。

current trend of development in shaft sinking is adoption of mobile steel form. Introduction of steel form in China began in 1965, and quite a few shafts have been sunk with this type of form, the deepest shaft being 1,000m deep. The steel forms now available have some disadvantages, e. g. inadequate structure, asynchronous reduction of diameter, deformable and inadequate removal of form. To solve these problems, a synchronous mobile form with telescopic structure was developed. This type of steel form was used in sinking Luling shaft and technical assessment was made by the Ministry of Coal Industry in 1985. The novelties of this type of steel form are: 1, it consists of 3 pieces of shell structures; 2, the form is assembled by heavy channel sections and bolts,3,a set of form removal structures is specially designed.lt will increase the removing force with the increase of the resistance, so that synchronous shrinkage of the shrinkage cracks may take place, It is time and labour-saving and not liable to deform and very con-vinent to remove the form. This paper also deals with calculation of forces acting on the structure, and it has sufficient strength to guarantee safety.